20171667020 has 24 divisors (see below), whose sum is σ = 42378648144. Its totient is φ = 8065210176.

The previous prime is 20171667013. The next prime is 20171667059. The reversal of 20171667020 is 2076617102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167927 + ... + 261806.

It is an arithmetic number, because the mean of its divisors is an integer number (1765777006).

Almost surely, 2^20171667020 is an apocalyptic number.

20171667020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20171667020 is an abundant number, since it is smaller than the sum of its proper divisors (22206981124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20171667020 is a wasteful number, since it uses less digits than its factorization.

20171667020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432089 (or 432087 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 20171667020 in words is "twenty billion, one hundred seventy-one million, six hundred sixty-seven thousand, twenty".